/*
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.walkaround.util.server.gwt;

import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Logger;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

/**
 * @author ohler@google.com (Christian Ohler)
 */
public class ZipSymbolMapsDirectory implements StackTraceDeobfuscator.SymbolMapsDirectory {

  @SuppressWarnings("unused")
  private static final Logger log = Logger.getLogger(ZipSymbolMapsDirectory.class.getName());

  private final ZipFile zip;
  private final String rootDir;

  public ZipSymbolMapsDirectory(ZipFile zip, String rootDir) {
    this.zip = zip;
    this.rootDir = rootDir;
  }

  @Override
  public InputStream getSymbolMapInputStream(String permutationStrongName) throws IOException {
    String fileName = rootDir + "/" + permutationStrongName + ".symbolMap";
    ZipEntry entry = zip.getEntry(fileName);
    log.info("ZipEntry for " + fileName + " is " + entry);
    if (entry == null) {
      throw new IOException(fileName + " not found in " + zip);
    }
    return zip.getInputStream(entry);
  }

}
